Elon Musk is famously quoted saying

“Work like hell. I mean you just have to put in 80 to 100 hour weeks every week. [This] improves the odds of success. If other people are putting in 40 hour work weeks and you’re putting in 100 hour work weeks, then even if you’re doing the same thing you know that… you will achieve in 4 months what it takes them a year to achieve.”

I agree with him, but there’s also another multiplier that is very often overlooked: efficiency and working on the right problem.

From Slava’s famous 57 Startup Lessons:

Working on the wrong thing for a month is equivalent to not showing up to work for a month at all.

Imagine working with a team that puts in long hours, but also understands the market twice as well as its competition. What takes them a year you can do in 10 weeks.